iio: mxs-lradc: Propagate the real error code on platform_get_irq() failure
No need to return a 'fake' return value on platform_get_irq() failure. Just return the error code itself instead. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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